Headset amplifier



FIG. 1 illustrates a perspective view of a headset amplifier;

FIG. 2 illustrates a front view thereof;

FIG. 3 illustrates a back view thereof;

FIG. 4 illustrates a right side view thereof;

FIG. 5 illustrates a left side view thereof;

FIG. 6 illustrates a top view thereof; and,

FIG. 7 illustrates a bottom view thereof.

The ornamental design for a headset amplifier, as shown and described.